W(X) = Ar(X) * n * 100%
Mr вещ-ва
Mr(SO2) = 64
Mr(SO3) = 80
SO2
W(О) = 16 * 2 * 100% = 50%
64
SO3
W(О) = 16 * 3 * 100% = 60%
80
SO2 2*16*100/64=50% 64г/моль SO3 3*16*100/80=60%80г/моль
